3667999 has 2 divisors, whose sum is σ = 3668000. Its totient is φ = 3667998.

The previous prime is 3667997. The next prime is 3668009. The reversal of 3667999 is 9997663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3667999 - 2¹ = 3667997 is a prime.

Together with 3667997, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3667997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833999 + 1834000.

It is an arithmetic number, because the mean of its divisors is an integer number (1834000).

Almost surely, 2^3667999 is an apocalyptic number.

3667999 is a deficient number, since it is larger than the sum of its proper divisors (1).

3667999 is an equidigital number, since it uses as much as digits as its factorization.

3667999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 49.

The square root of 3667999 is about 1915.2020781108. The cubic root of 3667999 is about 154.2208418644.

The spelling of 3667999 in words is "three million, six hundred sixty-seven thousand, nine hundred ninety-nine".